Method and apparatus for transmitting and receiving a synchronization signal and transmission system

ABSTRACT

Disclosed is a method and apparatus for transmitting and receiving a synchronization signal and a transmission system. In the method, a transmitting node determines a frequency band range in which a carrier is located, and configures or assumes synchronization channel information on the carrier according to the frequency band range, where the synchronization channel information includes at least one of: a subcarrier spacing or orthogonal frequency division multiplexing (OFDM) symbol information of a synchronization channel; and the transmitting node transmits the synchronization signal using the synchronization channel information.

CROSS REFERENCE TO RELATED APPLICATIONS

This patent document is a continuation of and claims the benefit ofpriority to U.S. patent application Ser. No. 16/252,525, filed on Jan.18, 2019 which is a continuation of and claims the benefit of priorityto International Patent Application No. PCT/CN2017/092830, filed on Jul.13, 2017, which claims the benefit of priority of Chinese PatentApplication No. 201610567483.2, filed on Jul. 18, 2016. The entirecontents of the before-mentioned patent applications are incorporated byreference as part of the disclosure of this application.

TECHNICAL FIELD

The application relates to, but is not limited to, the field ofcommunications, and in particular, relates to a method and apparatus fortransmitting and receiving a synchronization signal and a transmissionsystem.

BACKGROUND

With continuous advance in radio technologies, various radio servicesemerge. However, frequency spectrum resources on which the radioservices are based are limited. To confront with increasing demands forbandwidth by people, the frequency spectrum resources of 300 MHz to 3GHz mainly used by the traditional commercial communications areextremely in short supply and cannot meet the demands of future wirelesscommunications.

In a new generation mobile communication system, new radio (NR), systemnetworking is to be implemented with a carrier frequency higher than acarrier frequency used in 2G, 3G and 4G systems. Currently, frequencybands widely recognized by the industry and international organizationsare mainly 3 GHz to 6 GHz and 6 GHz to 100 GHz. These frequency bandssubstantially belong to the centimeter wave band and the millimeter waveband. Studies show that the phase noise of a radio frequency (RF) deviceis quite high at a frequency between 6 GHz and 100 GHz, especially at ahigher frequency. Such phase noise may be resisted with an increase inthe subcarrier width of the orthogonal frequency division multipleaccess system. The high frequency is significantly different from thelower frequency bands in propagation characteristic. Since thepropagation loss in the high frequency band is significantly larger thanthe propagation loss in the low frequency band, the coverage area of thehigh frequency band is generally much smaller than the coverage area ofthe low frequency band. A smaller coverage area generally goes with asmaller delay spread of the channel, and the corresponding coherencebandwidth is larger than the coherent bandwidth in the low frequencyband range of 300 M to 3000 M. The increased subcarrier width withrespect to the subcarrier width in the Long-Term Evolution (LTE) systemmay still satisfy the design requirement on the subcarrier spacingwithin the coherent bandwidth. Therefore, the subcarrier spacing (SC S)(equivalent to the subcarrier width) needs to be adjusted according tothe carrier frequency, and the adjustment is feasible and reasonable.

The NR system covers the carrier frequency from 6 G up to 100 G. Basicframe structure parameters such as different subcarrier spacing valuesneed to be used to adapt to the carrier frequency, that is, the framestructure design parameters at each carrier frequency are different. Forexample, the closer the frequency is to the core frequency of LTE, thecloser the typical frame structure parameters such as subcarrier spacingare to the existing parameters of LTE. The higher the frequency is, thelarger the subcarrier spacing is. The subcarrier spacing currently understudy may be selected to be 15 kHz, 30 kHz, 60 kHz, 75 kHz, 120 kHz upto 240 kHz, or less than 15 kHz.

The frame structure parameters may be different at different frequenciesin different systems. Moreover, even in NR systems at the samefrequency, the subcarrier spacing parameters may also be different fordifferent types of services. For example, the ultra reliable low latencycommunication (URLLC) service, which emphasizes low latency, has shortersymbols and larger subcarrier spacing than enhance mobile broadband(eMBB). In contrast, the massive machine type communication (mMTC),which has a service demand biased towards massive access and deepcoverage, may have much smaller subcarrier spacing and much longersymbol than the eMBB service. Multiple types of services are multiplexedon the same carrier, making the frame structure parameters in a systemmore complicated.

SUMMARY

The following is a summary of the subject matter described herein indetail. This summary is not intended to limit the scope of the claims.

Compared with the LTE system, the NR system also needs a uniquesynchronization system for downlink access of the terminal.

Embodiments of the present invention provide a method and apparatus fortransmitting a synchronization signal, a method and apparatus forreceiving a synchronization signal and a transmission system of asynchronization signal, to improve the synchronization precision betweenthe transmitting node and the receiving node.

An embodiment of the present invention provides a method fortransmitting a synchronization signal. The method includes: determining,by a transmitting node, a frequency band range in which a carrier islocated, and configuring or assuming synchronization channel informationon the carrier according to the frequency band range, where thesynchronization channel information includes at least one of: asubcarrier spacing or orthogonal frequency division multiplexing (OFDM)symbol information of a synchronization channel; and transmitting, bythe transmitting node, the synchronization signal using thesynchronization channel information.

In one implementation mode, the subcarrier spacing includes at least oneof: 15 kHz, 30 kHz, 60 kHz, 120 kHz, or 240 kHz.

In one implementation mode, the OFDM symbol information includes anumber of OFDM symbols, and the number of symbols includes at least oneof: one, two, four, six, eight, or sixteen.

In one implementation mode, configuring or assuming the synchronizationchannel information on the carrier according to the frequency band rangeincludes at least one of:

when the frequency band range is less than 6 GHz, configuring orassuming the subcarrier spacing of 15 kHz and two consecutive OFDMsymbols for the synchronization channel on the carrier;

when the frequency band range is greater than 6 GHz, configuring orassuming the subcarrier spacing of 60 kHz and two or four consecutiveOFDM symbols for the synchronization channel on the carrier;

when the frequency band range is between 6 GHz and 30 GHz, configuringor assuming the subcarrier spacing of 60 kHz and two or four consecutiveOFDM symbols for the synchronization channel on the carrier;

when the frequency band range is greater than 30 GHz, configuring orassuming the subcarrier spacing of 120 kHz and two or four or eightconsecutive OFDM symbols for the synchronization channel on the carrier;or

when the frequency band range is greater than 6 GHz, configuring orassuming the subcarrier spacing of 120 kHz and two or four or eightconsecutive OFDM symbols for the synchronization channel on the carrier.

In one implementation mode, when the transmitting node transmits thesynchronization signal on the carrier according to the frequency rangeof less than 6 GHz and the subcarrier spacing of 15 kHz, the methodfurther includes: transmitting, by the transmitting node, data otherthan the synchronization signal according to at least one subcarrierspacing of a group including: 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240kHz.

In one implementation mode, configuring or assuming the synchronizationchannel information on the carrier according to the frequency band rangeincludes: configuring or assuming, on the carrier, a subcarrier spacingof a frequency domain resource in an OFDM symbol on which thesynchronization channel is located according to the frequency bandrange, where the subcarrier spacing is the same as or different from asubcarrier spacing of a frequency domain resource of anon-synchronization channel in the OFDM symbol on which thesynchronization channel is located.

In one implementation mode, configuring the synchronization channelinformation on the carrier according to the frequency band rangeincludes: when the frequency band range is greater than 6 GHz or lessthan 6 GHz, configuring two OFDM symbols for the synchronization channelon the carrier, where the two OFDM symbols include one primarysynchronization sequence and one secondary synchronization sequence.

In one implementation mode, configuring or assuming the synchronizationchannel information on the carrier according to the frequency band rangeincludes: when the frequency band range is greater than 6 GHz,configuring or assuming, on the carrier, an OFDM symbol of a primarysynchronization sequence and an OFDM symbol of a secondarysynchronization sequence for the synchronization channel, where theprimary synchronization sequence includes at least one or twoconsecutive OFDM symbols, the secondary synchronization sequenceincludes at least two consecutive OFDM symbols, and the primarysynchronization sequence and the secondary synchronization sequence aretransmitted or retransmitted on respective OFDM symbols.

In one implementation mode, when the synchronization signal includes aprimary synchronization signal and a secondary synchronization signal,transmitting, by the transmitting node, the synchronization signal usingthe synchronization channel information includes: transmitting, by thetransmitting node, the primary synchronization signal through anomnidirectional antenna using the synchronization channel information;transmitting, by the transmitting node, the primary synchronizationsignal through a physical directional antenna using the synchronizationchannel information; and transmitting, by the transmitting node, thesecondary synchronization signal using the synchronization channelinformation after the signal is precoded using a beam parameter; wherethe primary synchronization signal is configured to describe a basestation and is transmitted and kept the same in each sector of the basestation, and the secondary synchronization signal is configured todescribe at least one of: a cell, a beam, or a beam group.

In one implementation mode, transmitting, by the transmitting node, thesynchronization signal using the synchronization channel informationincludes: transmitting, by the transmitting node, a first-levelsynchronization signal in each sector subordinate to a base station withan omnidirectional antenna using the synchronization channelinformation, where the all sectors subordinate to the base station arethe same; transmitting, by the transmitting node, a second-levelsynchronization signal in the each sector subordinate to the basestation using the synchronization channel information, where the sectorssubordinate to the base station are different from each other; andtransmitting, by the transmitting node, a third-level synchronizationsignal in the sectors subordinate to the base station in differentdirections of beams or beam groups using the synchronization channelinformation; where the first-level synchronization signal is configuredto describe the base station, the second-level synchronization signal isconfigured to describe the sectors subordinate to the base station, andthe third-level synchronization signal is configured to describe thebeams or beam groups.

In one implementation mode, transmitting, by the transmitting node, thesynchronization signal using the synchronization channel informationincludes: when a bandwidth of the carrier is less than 20 M,transmitting, by the transmitting node, a group of synchronizationsignals using the synchronization channel information; and when thebandwidth of the carrier is greater than or equal to 40 M, transmitting,by the transmitting node, a plurality of groups of synchronizationsignals discretely in a frequency domain using the synchronizationchannel information.

In one implementation mode, transmitting, by the transmitting node, thesynchronization signal using the synchronization channel informationincludes: determining, by the transmitting node, a number S of groups ofthe synchronization signal by using a following formula: S=└M/K┘, where└ ┘ represents rounding down, M is a bandwidth of the carrier, and K isa bandwidth corresponding to one group of synchronization signals, andthe bandwidth corresponding to the one group of synchronization signalsis 20 MHz or 40 MHz; and transmitting, by the transmitting node, the Sgroups of synchronization signals according to the spacing bandwidth K.

In one implementation mode, each group of the S groups ofsynchronization signals includes a same first-level synchronizationsignal and a same or different second-level synchronization signal,where different second-level synchronization signals are same insequence while different in a frequency domain and are transmitted byusing different beam parameters; where the first-level synchronizationsignal is configured to describe the base station, the second-levelsynchronization signal is configured to describe at least one of: asector, a beam or a beam group.

In one implementation mode, transmitting, by the transmitting node, thesynchronization signal using the synchronization channel informationincludes: transmitting, by the transmitting node, one first-levelsynchronization signal and a plurality of second-level synchronizationsignals in a frequency domain of the carrier.

In one implementation mode, transmitting, by the transmitting node, thesynchronization signal using the synchronization channel informationincludes: transmitting, by the transmitting node, the first-levelsynchronization signal on one OFDM symbol, and transmitting thesecond-level synchronization signal on a plurality of OFDM symbols,where the plurality of OFDM symbols are consecutive or equally spaced,and each of the plurality of OFDM symbols for transmitting thesecond-level synchronization signal uses a preset beam parameter.

In one implementation mode, a subcarrier spacing used for transmittingthe first-level synchronization signal is different from a subcarrierspacing used for transmitting the second-level synchronization signal.

In one implementation mode, when the subcarrier spacing of the frequencydomain resource of the synchronization channel is different from thesubcarrier spacing of the frequency domain resource of thenon-synchronization channel in the OFDM symbol on which thesynchronization channel is located, the subcarrier spacing of thefrequency domain resource of the synchronization channel is less thanthe subcarrier spacing of the frequency domain resource of thenon-synchronization channel.

In one implementation mode, transmitting, by the transmitting node, theS groups of synchronization signals according to the spacing bandwidth Kincludes: configuring and transmitting the one group of synchronizationsignals in a central resource located in each bandwidth K for thecarrier from a low-frequency end to a high-frequency end or from thehigh-frequency end to the low-frequency end.

An embodiment of the present invention provides a method for receiving asynchronization signal. The method includes: determining, by a receivingnode, a frequency band range of a carrier; determining, by the receivingnode, synchronization channel information according to the frequencyband range, where the synchronization channel information includes atleast one of: a subcarrier spacing or orthogonal frequency divisionmultiplexing (OFDM) symbol information of a synchronization channel; andreceiving, by the receiving node, the synchronization signal on thecarrier using the synchronization channel information.

In one implementation mode, the subcarrier spacing includes one of: 15kHz, 30 kHz, 60 kHz, 120 kHz, or 240 kHz.

In one implementation mode, the OFDM symbol information includes anumber of OFDM symbols, and the number of symbols includes one of: one,two, four, six, eight, or sixteen.

In one implementation mode, the determining, by the receiving node, thesynchronization channel information according to the frequency bandrange includes one of:

when the frequency band range is less than 6 GHz, determining thesubcarrier spacing of 15 kHz and two consecutive OFDM symbols; or

when the frequency band range is greater than 6 GHz, determining thesubcarrier spacing of 60 kHz and two or four consecutive OFDM symbols.

In one implementation mode, receiving, by the receiving node, thesynchronization signal on the carrier using the synchronization channelinformation includes:

when the frequency range is less than 6 GHz, receiving, by the receivingnode, the synchronization signal on the carrier according to thesubcarrier spacing of 15 kHz, where the method further includes:transmitting, by the receiving node, data other than the synchronizationsignal according to at least one subcarrier spacing of a groupincluding: 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz.

In one implementation mode, when the synchronization channel informationincludes the subcarrier spacing, receiving, by the receiving node, thesynchronization signal on the carrier using the synchronization channelinformation includes: receiving, by the receiving node, thesynchronization signal on a frequency domain resource according to thesubcarrier spacing. In one implementation mode, when the synchronizationchannel information includes the OFDM symbol information, determining,by the receiving node, the synchronization channel information accordingto the frequency band range includes: when the frequency band range isless than 6 GHz, determining, by the receiving node, two OFDM symbolsoccupied by the synchronization signal, where one OFDM symbol is aprimary synchronization sequence and an other OFDM symbol is a secondarysynchronization sequence.

In one implementation mode, when the synchronization channel informationincludes the OFDM symbol information, determining, by the receivingnode, the synchronization channel information according to the frequencyband range includes: when the frequency band range is greater than 6GHz, determining, by the receiving node, an OFDM symbol of a primarysynchronization sequence and an OFDM symbol of a secondarysynchronization sequence for the synchronization channel, where theprimary synchronization sequence includes at least one or twoconsecutive OFDM symbols, the secondary synchronization sequenceincludes at least two consecutive OFDM symbols, and the primarysynchronization sequence and the secondary synchronization sequence aretransmitted or retransmitted on respective OFDM symbols.

Another embodiment of the present invention provides an apparatus fortransmitting a synchronization signal. The apparatus includes: aconfiguration module, which is configured to determine a frequency bandrange in which a carrier is located, and configure or assumesynchronization channel information on the carrier according to thefrequency band range, where the synchronization channel informationincludes at least one of: a subcarrier spacing or orthogonal frequencydivision multiplexing (OFDM) symbol information of a synchronizationchannel; and a transmitting module, which is configured to transmit thesynchronization signal using the synchronization channel information.

In one implementation mode, the subcarrier spacing includes at least oneof: 15 kHz, 30 kHz, 60 kHz, 120 kHz, or 260 kHz.

In one implementation mode, the OFDM symbol information includes anumber of OFDM symbols, and the number of symbols includes at least oneof: one, two, four, six, eight, or sixteen.

In one implementation mode, the configuration module includes at leastone unit of a group including:

a first configuration unit, which is configured to configure or assumethe subcarrier spacing of 15 kHz and two consecutive OFDM symbols forthe synchronization channel on the carrier when the frequency band rangeis less than 6 GHz;

a second configuration unit, which is configured to configure or assumethe subcarrier spacing of 60 kHz and two or four consecutive OFDMsymbols for the synchronization channel on the carrier when thefrequency band range is greater than 6 GHz;

a third configuration unit, which is configured to configure or assumethe subcarrier spacing of 60 kHz and two or four consecutive OFDMsymbols for the synchronization channel on the carrier when thefrequency band range is between 6 GHz and 30 GHz;

a fourth configuration unit, which is configured to configure or assumethe subcarrier spacing of 120 kHz and two or four or eight consecutiveOFDM symbols for the synchronization channel on the carrier when thefrequency band range is greater than 30 GHz; and

a fifth configuration unit, which is configured to configure or assumethe subcarrier spacing of 120 kHz and two or four or eight consecutiveOFDM symbols for the synchronization channel on the carrier when thefrequency band range is greater than 6 GHz.

Another embodiment of the present invention provides an apparatus forreceiving a synchronization signal. The apparatus includes: a firstdetermination module, which is configured to determine a frequency bandrange of a carrier; a second determination module, which is configuredto determine synchronization channel information according to thefrequency band range, where the synchronization channel informationincludes at least one of: a subcarrier spacing or orthogonal frequencydivision multiplexing (OFDM) symbol information of a synchronizationchannel; and a receiving module, which is configured to receive thesynchronization signal on the carrier using the synchronization channelinformation.

In one implementation mode, the subcarrier spacing includes one of: 15kHz, 30 kHz, 60 kHz, 120 kHz, or 240 kHz.

In one implementation mode, the OFDM symbol information includes anumber of OFDM symbols, and the number of symbols includes one of: one,two, four, six, eight, or sixteen.

In one implementation mode, the second determination module includes atleast one unit of a group including: a first determination unit, whichis configured to determine the subcarrier spacing of 15 kHz and twoconsecutive OFDM symbols when the frequency band range is less than 6GHz; and a second determination unit, which is configured to determinethe subcarrier spacing of 60 kHz and two or four consecutive OFDMsymbols when the frequency band range is greater than 6 GHz.

Another embodiment of the present invention provides a transmissionsystem of a synchronization signal. The system includes a transmittingnode and a receiving node. The transmitting node includes: aconfiguration module, which is configured to determine a frequency bandrange in which a carrier is located, and configure or assumesynchronization channel information on the carrier according to thefrequency band range, where the synchronization channel informationincludes at least one of: a subcarrier spacing or orthogonal frequencydivision multiplexing (OFDM) symbol information of a synchronizationchannel; and a transmitting module, which is configured to transmit thesynchronization signal using the synchronization channel information.The receiving node includes: a first determination module, which isconfigured to determine the frequency band range of the carrier; asecond determination module, which is configured to determinesynchronization channel information according to the frequency bandrange; and a receiving module, which is configured to receive thesynchronization signal on the carrier using the synchronization channelinformation.

Another embodiment of the present invention further provides a storagemedium. The storage medium is configured to store program codes forexecuting the above-mentioned method for transmitting thesynchronization signal.

Another embodiment of the present invention further provides a storagemedium. The storage medium is configured to store program codes forexecuting the above-mentioned method for receiving the synchronizationsignal.

With the embodiments of the present invention, the transmitting nodedetermines the frequency band range in which the carrier is located, andconfigures or assumes the synchronization channel information on thecarrier according to the frequency band range, where the synchronizationchannel information includes at least one of: a subcarrier spacing ororthogonal frequency division multiplexing (OFDM) symbol information ofa synchronization channel; and the transmitting node transmits thesynchronization signal using the synchronization channel information.Since the synchronization signal is transmitted according to thefrequency band range of the carrier, and different frequency band rangescorrespond to different subcarrier spacings and/or OFDM symbolinformation, the synchronization precision between the transmitting nodeand the receiving node may be improved.

Other aspects can be understood after the drawings and detaileddescription are read and understood.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a flowchart of a method for transmitting a synchronizationsignal according to an embodiment of the present invention;

FIG. 2 is a flowchart of a method for receiving the synchronizationsignal according to an embodiment of the present invention;

FIG. 3 is a block diagram showing a structure of an apparatus fortransmitting a synchronization signal according to an embodiment of thepresent invention;

FIG. 4 is a block diagram showing a structure of an apparatus forreceiving the synchronization signal according to an embodiment of thepresent invention; and

FIG. 5 is a block diagram showing a structure of a transmission systemof the synchronization signal according to an embodiment of the presentinvention.

DETAILED DESCRIPTION

Hereinafter the present invention will be described in detail withreference to the drawings in conjunction with the embodiments. It is tobe noted that if not in collision, the embodiments and features thereinin the present application may be combined with each other.

It is to be noted that the terms “first”, “second” and the like in thespecification, claims and drawings of the present application are usedto distinguish between similar objects and are not necessarily used todescribe a particular order or sequence.

Embodiment 1

An embodiment provides a method for transmitting a synchronizationsignal. FIG. 1 is a flowchart of the method for transmitting thesynchronization signal according to the embodiment of the presentinvention. As shown in FIG. 1, the process includes the steps describedbelow.

In step S102, a transmitting node determines a frequency band range inwhich a carrier is located, and configures or assumes, on the carrier, asubcarrier spacing and/or orthogonal frequency division multiplexing(OFDM) symbol information of a synchronization channel according to thefrequency band range. The OFDM symbol information in the embodimentincludes: an OFDM position and/or the number of OFDM.

In step S104, the transmitting node transmits the synchronization signalusing the subcarrier spacing and/or the OFDM symbol information.

With the above steps, the transmitting node determines the frequencyband range in which the carrier is located, and configures, on thecarrier, the subcarrier spacing and/or the orthogonal frequency divisionmultiplexing (OFDM) symbol information of the synchronization channelaccording to the frequency band range; and the transmitting nodetransmits the synchronization signal using the subcarrier spacing and/orthe OFDM symbol information. Since the synchronization signal istransmitted according to the frequency band range of the carrier, anddifferent frequency band ranges correspond to different subcarrierspacings and/or OFDM symbol information, the synchronization precisionbetween the transmitting node and the receiving node may be improved.

In one implementation mode, the transmitting node mentioned in the abovesteps may be a base station, a terminal, or the like, but is not limitedthereto.

In one implementation mode, the subcarrier spacing includes at least oneof: 15 kHz, 30 kHz, 60 kHz, 120 kHz, or 240 kHz.

In one implementation mode, the OFDM symbol information includes thenumber and position of OFDM symbols, and the number of symbols includesat least one of: one, two, four, six, eight, or sixteen.

According to the implementation modes of the embodiment, a plurality ofschemes are provided for configuring or assuming the subcarrier spacingand/or the OFDM symbol information of the synchronization channelaccording to the frequency band range. Examples are included asdescribed below.

When the frequency band range is less than 6 GHz, the subcarrier spacingof 15 kHz and two consecutive OFDM symbols for the synchronizationchannel are configured or assumed on the carrier.

When the frequency band range is greater than 6 GHz, the subcarrierspacing of 60 kHz and two or four consecutive OFDM symbols for thesynchronization channel are configured or assumed on the carrier.

When the frequency band range is between 6 GHz and 30 GHz, thesubcarrier spacing of 60 kHz and two or four consecutive OFDM symbolsfor the synchronization channel are configured or assumed on thecarrier.

When the frequency band range is greater than 30 GHz, the subcarrierspacing of 120 kHz and two or four or eight consecutive OFDM symbols forthe synchronization channel are configured or assumed on the carrier.

When the frequency band range is greater than 6 GHz, the subcarrierspacing of 120 kHz and two or four or eight consecutive OFDM symbols forthe synchronization channel are configured or assumed on the carrier.

In one implementation mode, when the transmitting node transmits thesynchronization signal on the carrier according to the frequency rangeof less than 6 GHz and the subcarrier spacing of 15 kHz, thetransmitting node transmits data other than the synchronization signalaccording to at least one subcarrier spacing of a group including: 15kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz.

In one implementation mode, the step in which the synchronizationchannel information are configured or assumed on the carrier accordingto the frequency band range includes that: a subcarrier spacing of afrequency domain resource in an OFDM symbol on which the synchronizationchannel is located is configured or assumed on the carrier according tothe frequency band range. The subcarrier spacing is the same as ordifferent from a subcarrier spacing of a frequency domain resource of anon-synchronization channel in the OFDM symbol on which thesynchronization channel is located. When the subcarrier spacing of thefrequency domain resource of the synchronization channel is differentfrom the subcarrier spacing of the frequency domain resource of thenon-synchronization channel in the OFDM symbol on which thesynchronization channel is located, the subcarrier spacing of thefrequency domain resource of the synchronization channel is less thanthe subcarrier spacing of the frequency domain resource of thenon-synchronization channel.

In one implementation mode, the step in which the OFDM symbolinformation of the synchronization channel is configured on the carrieraccording to the frequency band range includes that: when the frequencyband range is greater than 6 GHz or less than 6 GHz, two OFDM symbolsare configured for the synchronization channel on the carrier. The twoOFDM symbols include one primary synchronization sequence and onesecondary synchronization sequence.

In one implementation mode, the step in which the OFDM symbolinformation of the synchronization channel is configured or assumed onthe carrier according to the frequency band range includes that: whenthe frequency band range is greater than 6 GHz, an OFDM symbol of aprimary synchronization sequence and an OFDM symbol of a secondarysynchronization sequence are configured or assumed for thesynchronization channel on the carrier. The primary synchronizationsequence includes at least one or two consecutive OFDM symbols. Thesecondary synchronization sequence includes at least two consecutiveOFDM symbols. The primary synchronization sequence and the secondarysynchronization sequence are transmitted or retransmitted on respectiveOFDM symbols.

In one implementation mode, when the synchronization signal includes aprimary synchronization signal and a secondary synchronization signal,the step in which the transmitting node transmits the synchronizationsignal using the subcarrier spacing and/or the OFDM symbol informationincludes the steps described below.

The transmitting node transmits the primary synchronization signalthrough an omnidirectional antenna using the subcarrier spacing and/orthe OFDM symbol information. In the embodiment, with the omnidirectionalantenna, the signal is transmitted without being precoded using abaseband beam parameter. The radiation range is wide.

The transmitting node transmits the primary synchronization signalthrough a physical directional antenna using the subcarrier spacingand/or the OFDM symbol information. In the embodiment, with the physicaldirectional antenna, the signal is transmitted after being precodedusing a baseband beam parameter to increase signal strength andanti-interference ability.

The transmitting node transmits the secondary synchronization signalusing the subcarrier spacing and/or the OFDM symbol information afterthe signal is precoded using a beam parameter.

The primary synchronization signal is configured to describe a basestation and is transmitted and kept the same in each sector of the basestation, and the secondary synchronization signal is configured todescribe a cell, or describe the cell and a beam (group) at the sametime.

In one implementation mode of the embodiment, when three levels ofsynchronization signals are provided, the first-level synchronizationsignal is configured to describe the base station, the second-levelsynchronization signal is configured to describe the sector subordinateto the base station, and the third-level synchronization signal isconfigured to describe the beam or beam group. The step in which thetransmitting node transmits the synchronization signal using thesubcarrier spacing and/or the OFDM symbol information includes the stepsdescribed below.

The transmitting node transmits the first-level synchronization signalin each sector subordinate to a base station with an omnidirectionalantenna using the subcarrier spacing and/or the OFDM symbol information,and the all sectors subordinate to the base station are insynchronization.

The transmitting node transmits the second-level synchronization signalin each sector subordinate to a base station using the subcarrierspacing and/or the OFDM symbol information, and the sectors are out ofsynchronization.

The transmitting node transmits the third-level synchronization signalin the sectors subordinate to the base station in different directionsof beams or beam groups using the subcarrier spacing and/or the OFDMsymbol information.

In one implementation mode, the step in which the transmitting nodetransmits the synchronization signal using the subcarrier spacing and/orthe OFDM symbol information includes that: when a bandwidth of thecarrier is less than 20 M, the transmitting node transmits a group ofsynchronization signals using the subcarrier spacing and/or the OFDMsymbol information; and when the bandwidth of the carrier is greaterthan or equal to 40 M, the transmitting node transmits a plurality ofgroups of synchronization signals discretely in a frequency domain usingthe subcarrier spacing and/or the OFDM symbol information.

In one implementation mode, the step in which the transmitting nodetransmits the synchronization signal using the subcarrier spacing and/orthe OFDM symbol information includes the steps described below.

In step S11, the transmitting node determines the number S of groups ofthe synchronization signals by using the following formula:

S=└M/K┘, where └ ┘ represents rounding down, M is a bandwidth of thecarrier, and K is a bandwidth corresponding to one group ofsynchronization signals, and the bandwidth corresponding to the onegroup of synchronization signals is 20 MHz or 40 MHz.

In step S12, the transmitting node transmits the S groups ofsynchronization signals according to the spacing bandwidth K.

Further, when the S groups of synchronization signals (which may includesynchronization signals at all levels or at several of the all levels)are determined to be transmitted, all groups of synchronization signalsare transmitted from a low-frequency end to a high-frequency end or fromthe high-frequency end to the low-frequency end in the carrier, eachgroup of synchronization signals being configured and transmitted in acentral resource located in a respective bandwidth K.

In one implementation mode, each group of the S groups ofsynchronization signals includes the same first-level synchronizationsignal and the same or different second-level synchronization signal.Different second-level synchronization signals are the same in sequencewhile different in a frequency domain and are transmitted by usingdifferent beam parameters. The first-level synchronization signal isconfigured to describe the base station, and the second-levelsynchronization signal is configured to describe at least one of: asector, a beam or a beam group. It is to be noted that two levels ofsynchronization signals are provided here.

In one implementation mode, the step in which the transmitting nodetransmits the synchronization signal using the subcarrier spacing and/orthe OFDM symbol information includes that: the transmitting nodetransmits one first-level synchronization signal and a plurality ofsecond-level synchronization signals in a frequency domain of thecarrier.

In one implementation mode, the step in which the transmitting nodetransmits the synchronization signal using the subcarrier spacing and/orthe OFDM symbol information includes that: the transmitting nodetransmits the first-level synchronization signal on one OFDM symbol, andtransmits the second-level synchronization signal on a plurality of OFDMsymbols. The OFDM symbols are consecutive or equally spaced, and each ofthe OFDM symbols for transmitting the second-level synchronizationsignal uses a preset beam parameter.

In one implementation mode, a subcarrier spacing used for transmittingthe first-level synchronization signal is different from a subcarrierspacing used for transmitting the second-level synchronization signal.

An embodiment provides a method for receiving a synchronization signal.FIG. 2 is a flowchart of the method for receiving the synchronizationsignal according to the embodiment of the present invention. As shown inFIG. 2, the process includes the steps described below.

In step S202, a receiving node determines a frequency band range of acarrier.

In step S204, the receiving node determines a subcarrier spacing and/orOFDM symbol information according to the frequency band range.

In step S206, the receiving node receives the synchronization signal onthe carrier using the subcarrier spacing and/or the OFDM symbolinformation.

In one implementation mode, the receiving node mentioned in the abovesteps may be a base station, a terminal, or the like, but is not limitedthereto.

In one implementation mode, the subcarrier spacing includes one of: 15kHz, 30 kHz, 60 kHz, 120 kHz, or 240 kHz. The number of OFDM symbolsincludes one of: one, two, four, six, eight, or sixteen.

In one implementation mode, the step in which the receiving nodedetermines the subcarrier spacing and/or the OFDM symbol informationaccording to the frequency band range may include, but is not limited tothe steps described below.

When the frequency band range is less than 6 GHz, the subcarrier spacingof 15 kHz and two consecutive OFDM symbols are determined.

When the frequency band range is greater than 6 GHz, the subcarrierspacing of 60 kHz and two or four consecutive OFDM symbols aredetermined.

In one implementation mode, the step in which the receiving nodereceives the synchronization signal on the carrier according to thesubcarrier spacing and/or the number of OFDM symbols includes that: whenthe frequency band range is less than 6 GHz, the receiving node receivesthe synchronization signal on the carrier according to the subcarrierspacing of 15 kHz, and transmits data other than the synchronizationsignal according to at least one subcarrier spacing of a groupincluding: 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz.

In one implementation mode, the step in which the receiving nodereceives the synchronization signal on the carrier according to thesubcarrier spacing includes that: the receiving node receives thesynchronization signal on a frequency domain resource according to thesubcarrier spacing.

In one implementation mode, the step in which the receiving nodedetermines the OFDM symbol information according to the frequency bandrange includes that: when the frequency band range is less than 6 GHz,the receiving node determines two OFDM symbols occupied by thesynchronization signal. One OFDM symbol is a primary synchronizationsequence and the other OFDM symbol is a secondary synchronizationsequence.

In one implementation mode, the step in which the receiving nodedetermines the OFDM symbol information according to the frequency bandrange includes that: when the frequency band range is greater than 6GHz, the receiving node determines an OFDM symbol of a primarysynchronization sequence and an OFDM symbol of a secondarysynchronization sequence for the synchronization channel. The primarysynchronization sequence includes at least one or two consecutive OFDMsymbols, the secondary synchronization sequence includes at least twoconsecutive OFDM symbols, and the primary synchronization sequence andthe secondary synchronization sequence are transmitted or retransmittedon respective OFDM symbols.

From the description of the implementation modes described above, itwill be apparent to those skilled in the art that the method in theembodiments described above may be implemented by software plus anecessary general-purpose hardware platform, or may of course beimplemented by hardware. However, in many cases, the former is apreferred implementation mode. Based on this understanding, thesolutions provided by the present invention may be embodied in the formof a software product. The computer software product is stored in astorage medium (such as a read-only memory (ROM)/random access memory(RAM), a magnetic disk or an optical disk) and includes severalinstructions for enabling a terminal device (which may be a mobilephone, a computer, a server, a network device, or the like) to executethe method according to each embodiment of the present invention.

Embodiment 2

An embodiment further provides an apparatus for transmitting asynchronization signal, an apparatus for receiving the synchronizationsignal, and a transmission system of the synchronization signal forimplementing the above-mentioned embodiments and implementation modes.What has been described will not be repeated. As used below, the term“module” may be software, hardware or a combination thereof capable ofimplementing predetermined functions. The apparatus described below inthe embodiment may be implemented by software, but implementation byhardware or by a combination of software and hardware is also possibleand conceived.

FIG. 3 is a block diagram showing a structure of the apparatus fortransmitting the synchronization signal according to an embodiment ofthe present invention. As shown in FIG. 3, the apparatus includes aconfiguration module 30 and a transmitting module 32.

The configuration module 30 is configured to determine a frequency bandrange in which a carrier is located, and configure or assume asubcarrier spacing and/or OFDM symbol information on the carrieraccording to the frequency band range.

The transmitting module 32 is configured to transmit the synchronizationsignal using the subcarrier spacing and/or the OFDM symbol information.

In one implementation mode, the subcarrier spacing may include, but isnot limited to: 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz.

In one implementation mode, the OFDM symbol information includes thenumber of OFDM symbols, and the number of symbols may include, but isnot limited to: one, two, four, six, eight, or sixteen.

In one implementation mode, the configuration module 30 includes atleast one unit of a group including: a first configuration unit, whichis configured to configure or assume the subcarrier spacing of 15 kHzand two consecutive OFDM symbols for the synchronization channel on thecarrier when the frequency band range is less than 6 GHz; a secondconfiguration unit, which is configured to configure or assume thesubcarrier spacing of 60 kHz and two or four consecutive OFDM symbolsfor the synchronization channel on the carrier when the frequency bandrange is greater than 6 GHz; a third configuration unit, which isconfigured to configure or assume the subcarrier spacing of 60 kHz andtwo or four consecutive OFDM symbols for the synchronization channel onthe carrier when the frequency band range is between 6 GHz and 30 GHz; afourth configuration unit, which is configured to configure or assumethe subcarrier spacing of 120 kHz and two or four or eight consecutiveOFDM symbols for the synchronization channel on the carrier when thefrequency band range is greater than 30 GHz; and a fifth configurationunit, which is configured to configure or assume the subcarrier spacingof 120 kHz and two or four or eight consecutive OFDM symbols for thesynchronization channel on the carrier when the frequency band range isgreater than 6 GHz.

FIG. 4 is a block diagram showing a structure of an apparatus forreceiving the synchronization signal according to an embodiment of thepresent invention. As shown in FIG. 4, the apparatus includes a firstdetermination module 40, a second determination module 42 and areceiving module 44.

The first determination module 40 is configured to determine a frequencyband range of a carrier.

The second determination module 42 is configured to determine asubcarrier spacing and/or OFDM symbol information according to thefrequency band range.

The receiving module 44 is configured to receive the synchronizationsignal on the carrier using the subcarrier spacing and/or OFDM symbolinformation.

In one implementation mode, the subcarrier spacing may include, but isnot limited to: 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz.

In one implementation mode, the OFDM symbol information includes thenumber of OFDM symbols, and the number of OFDM symbols may include, butis not limited to: one, two, four, six, eight, or sixteen.

In one implementation mode, the second determination module includes atleast one unit of a group including: a first determination unit, whichis configured to determine the subcarrier spacing of 15 kHz and twoconsecutive OFDM symbols when the frequency band range is less than 6GHz; and a second determination unit, which is configured to determinethe subcarrier spacing of 60 kHz and two or four consecutive OFDMsymbols when the frequency band range is greater than 6 GHz.

FIG. 5 is a block diagram showing a transmission system of thesynchronization signal according to an embodiment of the presentinvention. As shown in FIG. 5, the system includes a transmitting node50 and a receiving node 52. The transmitting node 50 includes aconfiguration module 502, which is configured to determine a frequencyband range in which a carrier is located, and configure or assume asubcarrier spacing and/or OFDM symbol information on the carrieraccording to the frequency band range; and a transmitting module 504,which is configured to transmit the synchronization signal using thesubcarrier spacing and/or the OFDM symbol information.

The receiving node 52 includes: a first determination module 522, whichis configured to determine the frequency band range of the carrier; asecond determination module 524, which is configured to determine asubcarrier spacing and/or OFDM symbol information according to thefrequency band range; and a receiving module 526, which is configured toreceive the synchronization signal on the carrier using the subcarrierspacing and/or the number of OFDM symbols.

It is to be noted that the various modules described above may beimplemented by software or hardware. Implementation by hardware may, butis not limited to, be performed in the following modes: the variousmodules described above are located in a same processor, or the variousmodules described above are located in their respective processors inany combination form.

Embodiment 3

An embodiment relates to a data transmission and control structure on anunlicensed carrier and a shared licensed carrier, and provides a methodfor performing data transmission and control using the structure. Theembodiment includes a plurality of examples for describing theembodiment of the present invention in detail in conjunction with actualscenarios and implementation modes.

Example 1

A transmitting node determines a frequency band in which a carrier islocated. When the frequency band is less than or equal to a certainfrequency point (for example, 6 GHz), the transmitting node transmits asynchronization signal according to a assumed subcarrier spacing (forexample, 15 kHz). When the frequency band is greater than a certainfrequency point (for example, 6 GHz), the transmitting node transmitsthe synchronization signal according to the assumed subcarrier spacing(for example, 60 kHz or 120 kHz).

When the receiving node receives a downlink synchronization signal, thereceiving node first determines a frequency band of a carrier to bereceived. When the frequency band is less than or equal to a certainfrequency point (for example, 6 GHz), the receiving node receives andprocesses the synchronization signal according to the assumed subcarrierspacing (for example, 15 kHz). When the frequency band is greater than acertain frequency point (for example, 6 GHz), the receiving nodereceives and processes the synchronization signal according to theassumed subcarrier spacing (for example, 60 kHz or 120 kHz).

According to different frequency points of the carrier, the subcarrierspacing of the synchronization signal on the carrier includes one ormore of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz. A carrier at a lowfrequency point may use all the candidate subcarrier spacings, and acarrier at a high frequency point may only use the larger subcarrierspacings to better overcome the interference between the subcarriers atthe high frequency point.

Example 2

The transmitting node determines a frequency band in which a carrier islocated. When the frequency band is less than or equal to a certainfrequency point (for example, 6 GHz), the transmitting node transmits asynchronization signal on assumed OFDM symbols (for example, two assumedsymbols, with one for a first-level synchronization signal, i.e., aprimary synchronization signal, and the other one for a second-levelsynchronization signal, i.e., a secondary synchronization signal). Whenthe frequency band is greater than a certain frequency point (forexample, 6 GHz), the transmitting node transmits the synchronizationsignal on assumed OFDM symbols (for example, four assumed symbols, withat least one symbol for the first-level synchronization signal and atleast two symbols for the secondary synchronization signal). Forexample, two symbols are used for the first-level synchronizationsignals, and the two symbols are retransmitted. Two symbols are used forthe second-level synchronization signal, and the two symbols areretransmitted. The symbols actually used for the first-levelsynchronization signal and the symbols used for the second-levelsynchronization signal may be flexibly assumed.

When the receiving node receives a downlink synchronization signal, thereceiving node first determines a frequency band of a carrier to bereceived. When the frequency band is less than or equal to a certainfrequency point (for example, 6 GHz), the receiving node receives thesynchronization signal on the assumed number of OFDM symbols (forexample, two assumed symbols, with one for the first-levelsynchronization signal, i.e., the primary synchronization signal, andthe other one for the second-level synchronization signal, i.e., thesecondary synchronization signal). When the frequency band is greaterthan a certain frequency point (for example, 6 GHz), the receiving nodereceives the synchronization signal on the assumed number of OFDMsymbols (for example, four OFDM symbols).

As the synchronization signals use different subcarrier spacings, thecandidate number of OFDM symbols for the synchronization signal includesone or more of one, two, four, six, eight, and sixteen.

Example 3

Based on the example 2, when the frequency point of the carrier ishigher (for example, the frequency band is 30 GHz or 60 GHz), thetransmitting node may transmit the synchronization signal using a largersubcarrier spacing (a subcarrier spacing greater than 60 kHz, forexample, a subcarrier spacing of 120 kHz). At this time, the number ofsymbols for the synchronization signal is sixteen. At least one symbolis used for the first-level synchronization signal (generally withoutusing a beam parameter), and the second-level synchronization signaluses at most the remaining symbols. It is also conceivable that twosymbols are used for the first-level synchronization signal and areretransmitted with respect to each other. Two symbols are also used forthe second-level synchronization signal and are retransmitted withrespect to each other. The remaining symbols continue to be used for thesecond-level synchronization signals. At this time, a plurality ofsecond-level synchronization signals is transmitted, and may betransmitted using different beam (direction) parameters (e.g., basebandbeam parameters). Regardless of the method used for transmission, thecorresponding symbol positions (positions which may also be understoodas the number, because the total number of all positions is the number),and/or corresponding beam parameters for transmission are assumed inadvance, so that the receiving node receives the signal at the assumedsymbol positions (or according to the assumed beam parameters).

At this time, the coverage of the high frequency point is poor, so it isconceivable to increase the coverage of the synchronization signal byretransmitting consecutive symbols.

The receiving node receives the transmitted synchronization signal in aassumed manner according to the frequency point of the receivingcarrier.

Example 4

Based on the examples 1, 2, and 3, the transmitting node determines asubcarrier spacing and a symbol position for transmitting asynchronization signal, and then also performs transmission of anon-synchronization signal in the manner described below.

On the symbol for transmitting the synchronization signal, thetransmitting node transmits the frequency domain position of thesynchronization signal by using the subcarrier spacing obtained in theforegoing manner. For the frequency domain resource of the frequencydomain position of the non-synchronization signal on the symbol, thetransmission of data other than the synchronization signal may beperformed using a subcarrier spacing different from the subcarrierspacing of the synchronization signal.

In one manner, for the first-level synchronization signal, the beamparameter is not used for transmission, so cell-level system informationor broadcast type information may be transmitted on other frequencydomain resources of the symbols of the first-level synchronizationsignal. A cell-level reference signal may also be transmitted formeasurement of reference signal receiving power (RSRP). User data isalso allowed to be transmitted. If a non-synchronization signal at alower level is transmitted, a subcarrier spacing used is less than orequal to the subcarrier spacing used for the synchronization signal. Forthe second-level synchronization signal (or the synchronization signaltransmitted by using the beam parameter), system information at a beamlevel or the broadcast type information may be transmitted on otherfrequency domain resources of the symbols on which the second-levelsynchronization signal is located. A beam-level reference signal mayalso be transmitted for measurement of the RSRP. If a beam-levelnon-synchronization signal is transmitted, a subcarrier spacing used isless than or equal to the subcarrier spacing used by the synchronizationsignal (the second-level synchronization signal or the synchronizationsignal transmitted using the beam parameter).

Example 5

When a transmitting node transmits a synchronization signal, thetransmission is performed according to a level of the synchronizationsignal.

If the synchronization signal is divided into two levels, a first-levelsynchronization signal (i.e., primary synchronization signal) does notuse a beam parameter (i.e., the synchronization signal is not precodedusing the baseband beam parameter). A second-level synchronizationsignal (i.e., secondary synchronization signal) is transmitted using thebeam parameter. If the first-level synchronization signal is repeatedlytransmitted multiple times on adjacent symbols, a first-levelsynchronization signal on the first symbol has a cyclic prefix (CP), andfirst-level synchronization signals on subsequent symbols do not havethe CP. When the second-level synchronization signal is transmitted, ifthe transmission is repeated on the adjacent symbols, a second-levelsynchronization signal on the first symbol has a cyclic prefix, and thesecond-level synchronization signal on each subsequent symbol carriesthe CP which is the same as the CP on the first symbol.

If the synchronization signal is divided into three levels (i.e., afirst-level synchronization signal, a second-level synchronizationsignal, and a third-level synchronization signal), the first-level andsecond-level signals jointly complete an indication of a cell, and thethird-level signal completes an indication of a beam or a beam group. Atthis time, it may be considered that the first-level and second-levelsignals are not transmitted by using the beam parameter, and thethird-level signal is transmitted by using the beam parameter.

In the case of two levels, in one transmission period of thesynchronization signal, the transmitting node may transmit thefirst-level synchronization signal only once, and transmit thesecond-level synchronization signal on a plurality of symbols. Theplurality of symbols may be consecutive or equally spaced. Thesecond-level synchronization signal is transmitted on each symbol amongthe plurality of symbols by using a predetermined beam parameter.

In the case of two levels, the transmitting node may transmit thefirst-level and second-level synchronization signals according todifferent subcarrier spacings. In the case of three levels, thetransmitting node may transmit the first-level and second-levelsynchronization signals according to the same subcarrier spacing, andthe third-level synchronization signal according to a subcarrier spacingdifferent from the subcarrier spacing used for the first-level andsecond-level synchronization signals.

Example 6

The transmitting node determines the number of synchronization signalstransmitted in a frequency domain according to a carrier bandwidth.

When the transmitting node determines that the bandwidth of the carrieris less than a certain bandwidth value (for example, 20 M), thetransmitting node transmits one group of synchronization signals overthe frequency domain of the carrier. When the bandwidth of the carrieris greater than or equal to a certain value (for example, 40 M), thetransmitting node transmits a plurality of groups of synchronizationsignals over the frequency domain of the carrier.

The transmitting node determines the number S of groups of thesynchronization signals by using the following formula: S=└M/K┘. └ ┘represents rounding down, M is the bandwidth of the carrier, and K is abandwidth corresponding to one group of synchronization signals, or K isa spacing bandwidth between a plurality of synchronization signals, forexample 20 MHz or 40 MHz.

The transmitting node determines that, on a same carrier, each group ofsynchronization signals includes a same first-level synchronizationsignal and a same or different second-level synchronization signal.Different second-level synchronization signals are same in sequencewhile different in a frequency domain and are transmitted by usingdifferent beam parameters.

Example 7

Based on the example 6, here only one group of the first-levelsynchronization signals is transmitted in the frequency domain of thecarrier, while the second-level synchronization signal is stilltransmitted as processed in accordance with the second-levelsynchronization signal in the example 6.

Further, if the synchronization signal is divided into three levels, thefirst level and the second level are processed in accordance with thefirst-level synchronization signal in the example 6 or the example 7,and the third level is processed in accordance with the second-levelsynchronization signal in the example 6.

With the method for transmitting the synchronization signal of thepresent application, the synchronization precision between thetransmitting node and the receiving node may be improved.

Embodiment 4

An embodiment of the present invention further provides a storagemedium. In the embodiment, the storage medium may be configured to storeprogram codes for executing the steps described below.

In step S1, a transmitting node determines a frequency band range inwhich a carrier is located, and configures or assumes a subcarrierspacing and/or OFDM symbol information on the carrier according to thefrequency band range.

In step S2, the transmitting node transmits the synchronization signalusing the subcarrier spacing and/or the OFDM symbol information.

In the embodiment, the storage medium may include, but is not limitedto, a USB flash disk, a read-only memory (ROM), a random access memory(RAM), a mobile hard disk, a magnetic disk, an optical disk or anothermedium capable of storing program codes.

In one implementation mode of the embodiment, according to the programcodes stored in the storage medium, a processor performs a step in whichthe transmitting node determines the frequency band range in which thecarrier is located, and configures or assumes the subcarrier spacingand/or the OFDM symbol information on the carrier according to thefrequency band range.

In one implementation mode of the embodiment, according to the programcodes stored in the storage medium, a processor performs a step in whichthe transmitting node transmits the synchronization signal using thesubcarrier spacing and/or the OFDM symbol information.

For examples in the embodiment, reference may be made to the examplesdescribed in the above embodiments and implementation modes, and theexamples will not be repeated in the embodiment.

An embodiment of the present invention further provides a storagemedium. In the embodiment, the storage medium may be configured to storeprogram codes for executing the steps described below.

In step S1, a receiving node determines a frequency band range of acarrier.

In step S2, the receiving node determines a subcarrier spacing and/orOFDM symbol information according to the frequency band range.

In step S3, the receiving node receives the synchronization signal onthe carrier using the subcarrier spacing and/or the OFDM symbolinformation.

In the embodiment, the storage medium may include, but is not limitedto, a USB flash disk, a read-only memory (ROM), a random access memory(RAM), a mobile hard disk, a magnetic disk, an optical disk or anothermedium capable of storing program codes.

For examples in the embodiment, reference may be made to the examplesdescribed in the above embodiments and implementation modes, and theexamples will not be repeated in the embodiment.

Each of the above-mentioned modules or steps of the present inventionmay be implemented by a universal computing apparatus, they may beconcentrated on a single computing apparatus or distributed on a networkformed by multiple computing apparatuses, and they may be implemented byprogram codes executable by the computing apparatuses, so that they maybe stored in a storage apparatus for execution by the computingapparatuses, and in some circumstances, the illustrated or describedsteps may be executed in sequences different from those describedherein, or they may be made into various integrated circuit modulesseparately, or multiple modules or steps therein may be made into asingle integrated circuit module for implementation. In this way, theembodiments of the present invention are not limited to any specificcombination of hardware and software. The above are only the embodimentsof the present invention and are not intended to limit the presentapplication, and for those skilled in the art, the present applicationmay have various modifications and variations. Any modifications,equivalent substitutions, improvements and the like made within thespirit and principle of the present application should fall within thescope of the present application.

INDUSTRIAL APPLICABILITY

With the embodiments of the present invention, the transmitting nodedetermines the frequency band range in which the carrier is located, andconfigures or assumes the synchronization channel information on thecarrier according to the frequency band range, where the synchronizationchannel information includes at least one of: a subcarrier spacing ororthogonal frequency division multiplexing (OFDM) symbol information ofa synchronization channel; and the transmitting node transmits thesynchronization signal using the synchronization channel information.Since the synchronization signal is transmitted according to thefrequency band range of the carrier, and different frequency band rangescorrespond to different synchronization channel information, thesynchronization precision between the transmitting node and thereceiving node may be improved.

1-37. (canceled)
 38. A method for determining a synchronization signal,comprising: determining, by a receiving node, a frequency band range fora carrier and a synchronization channel information on the carrieraccording to the frequency band range, wherein the synchronizationchannel information comprises: a subcarrier spacing of thesynchronization channel; and an orthogonal frequency divisionmultiplexing (OFDM) symbol information of a synchronization channel; andreceiving, by the receiving node, the synchronization channel using thesynchronization channel information.
 39. The method of claim 38, whereinthe OFDM symbol information comprises a quantity of OFDM symbols, andwherein the quantity of OFDM symbols is four.
 40. The method of claim38, wherein a configuration of the synchronization channel informationcomprises one of: in response to the frequency band range being lessthan a frequency, configuring the subcarrier spacing for 15 kHz or 30kHz; or in response to the frequency band range being greater than thefrequency, configuring the subcarrier spacing for 120 kHz or 240 kHz.41. The method of claim 38, wherein the subcarrier spacing comprises atleast one of: 15 kHz, 30 kHz, 120 kHz, or 240 kHz.
 42. The method ofclaim 40, wherein when the receiving node receives the synchronizationchannel on the carrier according to the frequency band range of lessthan a frequency and the subcarrier spacing comprises 15 kHz, the methodfurther comprising: receiving, by the receiving node, data other thanthe synchronization channel using a subcarrier spacing, wherein thesubcarrier spacing comprises one of: 15 kHz, 30 kHz, or 60 kHz.
 43. Themethod of claim 38, further comprising: receiving, by the receivingnode, data other than the synchronization channel using a firstsubcarrier spacing, wherein the first subcarrier spacing is less than orequal to the subcarrier spacing used to receive the synchronizationchannel.
 44. The method of claim 40, wherein the frequency is 6 GHz. 45.An apparatus comprising a processor configured to perform operationscomprising: determining, by a receiving node, a frequency band range fora carrier and a synchronization channel information on the carrieraccording to the frequency band range, wherein the synchronizationchannel information comprises: a subcarrier spacing of a synchronizationchannel; and an orthogonal frequency division multiplexing (OFDM) symbolinformation of a synchronization channel; and receiving, by thereceiving node, the synchronization channel using the synchronizationchannel information, wherein the determining and the receiving determinethe synchronization channel.
 46. The apparatus of claim 45, wherein theOFDM symbol information comprises a quantity of OFDM symbols, andwherein the quantity of OFDM symbols is four.
 47. The apparatus of claim45, wherein a configuration of the synchronization channel informationcomprises one of: in response to the frequency band range being lessthan a frequency, configuring the subcarrier spacing for 15 kHz or 30kHz; or in response to the frequency band range being greater than thefrequency, configuring the subcarrier spacing for 120 kHz or 240 kHz.48. A method for generating a synchronization channel, comprising:determining, by a transmitting node, a starting frequency for a carrier;configuring a synchronization channel information on the carrieraccording to the starting frequency, wherein the synchronization channelinformation comprises: a subcarrier spacing of the synchronizationchannel, and an orthogonal frequency division multiplexing (OFDM) symbolinformation of the synchronization channel; and transmitting, by thetransmitting node, the synchronization channel using the synchronizationchannel information, wherein if the starting frequency is less than orequal to a frequency, then the synchronization channel comprises a firstquantity of OFDM symbols, wherein a first OFDM symbol in the firstquantity of OFDM symbols comprises a primary synchronization signal anda second OFDM symbol in the first quantity of OFDM symbols comprises asecondary synchronization signal, wherein if the starting frequency isgreater than the frequency, then the synchronization channel comprises asecond quantity of OFDM symbols, wherein a third OFDM symbol in thesecond quantity of OFDM symbols comprises the primary synchronizationsignal and a fourth and fifth OFDM symbols in the second quantity ofOFDM symbols comprises the secondary synchronization signal.
 49. Themethod of claim 48, wherein the frequency is 6 GHz.
 50. The method ofclaim 48, wherein the first quantity of ODFM symbols is two OFDM symbolsand the second quantity of OFDM symbols is four OFDM symbols.
 51. Themethod of claim 48, wherein the subcarrier spacing comprises at leastone of: 15 kHz, 30 kHz, 120 kHz, or 240 kHz.
 52. The method of claim 48,wherein the configuring the synchronization channel information on thecarrier according to the starting frequency comprises one of: inresponse to the starting frequency being less than a frequency,configuring the subcarrier spacing of 15 kHz or 30 kHz; or in responseto the starting frequency being greater than the frequency, configuringthe subcarrier spacing of 240 kHz or 120 kHz.
 53. The method of claim48, wherein the frequency is 30 GHz, wherein the starting frequency isgreater than the frequency, wherein the second quantity of OFDM symbolsis 16, wherein a sixth through a twelfth OFDM symbol are included in thesecondary synchronization signal, and wherein the subcarrier spacing isgreater than 60 kHz.
 54. The method of claim 48, further comprising:transmitting, by a transmitting node, a non-synchronization signal usinga different subcarrier spacing from the subcarrier spacing of thesynchronization channel, wherein the OFDM symbol information includes afrequency domain position of the synchronization channel.
 55. The methodof claim 48, wherein the primary synchronization signal is not precodedusing a baseband beam parameter, and wherein the secondarysynchronization signal is transmitted using the baseband beam parameter.56. The method of claim 55, wherein if the primary synchronizationsignal is transmitted on multiple occasions on adjacent symbols, thenthe primary synchronization signal on the first OFDM symbol has a cyclicprefix (CP), and the primary synchronization signal on subsequent OFDMsymbols do not have the CP, and wherein if the secondary synchronizationsignal is transmitted on multiple occasions on the adjacent symbols,then the secondary synchronization signal on the first OFDM symbol hasthe CP, and the secondary synchronization signal on each subsequentsymbol has the CP.
 57. The method of claim 48, wherein the transmittingnode determines a quantity of synchronization channels transmitted in abandwidth, and wherein if the transmitting node determines that thebandwidth is less than a first bandwidth, then the transmitting nodetransmits a group of synchronization channels using the bandwidth, andwherein if the bandwidth is greater than or equal to a second bandwidth,then the transmitting node transmits a plurality of the group ofsynchronization channels using the bandwidth.
 58. The method of claim57, wherein the first bandwidth is 20 MHz, and wherein the secondbandwidth is 40 MHz.
 59. The method of claim 57, wherein the group ofsynchronization channels and the plurality of the group ofsynchronization channels include only one group of a primarysynchronization signal.
 60. A method for determining a synchronizationchannel, comprising: determining, by a receiving node, a startingfrequency for a carrier; determining a synchronization channelinformation on the carrier according to the starting frequency, whereinthe synchronization channel information comprises: a subcarrier spacingof the synchronization channel, and an orthogonal frequency divisionmultiplexing (OFDM) symbol information of the synchronization channel;and receiving, by the receiving node, the synchronization channel usingthe synchronization channel information, wherein if the startingfrequency is less than or equal to a frequency, then the synchronizationchannel comprises a first quantity of OFDM symbols, wherein a first OFDMsymbol in the first quantity of OFDM symbols comprises a primarysynchronization signal and a second OFDM symbol in the first quantity ofOFDM symbols comprises a secondary synchronization signal, wherein ifthe starting frequency is greater than the frequency, then thesynchronization channel comprises a second quantity of OFDM symbols,wherein a third OFDM symbol in the second quantity of OFDM symbolscomprises the primary synchronization signal and a fourth and fifth OFDMsymbols in the second quantity of OFDM symbols comprises the secondarysynchronization signal.
 61. The method of claim 60, wherein thefrequency is 6 GHz.
 62. The method of claim 60, wherein the firstquantity of ODFM symbols is two OFDM symbols and the second quantity ofOFDM symbols is four OFDM symbols.